package com.wzt.lianfirecontrol;

import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.os.Build;
import android.util.Log;

import com.wzt.lianfirecontrol.bean.ConstData;
import com.wzt.lianfirecontrol.utils.Utils;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.Thread.UncaughtExceptionHandler;
import java.lang.reflect.Field;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

/**
 *作用：全局未捕获异常回调处理类
 *作者：unfind
 *时间：2014年11月29日10:01:35 
 */
public class AppExHandler implements UncaughtExceptionHandler {
public static final String TAG = "CrashHandler";  
    
    /**系统默认的UncaughtException处理类  **/
    private UncaughtExceptionHandler mDefaultHandler;
    /**GPSExHandler实例**/ 
    private static AppExHandler INSTANCE = new AppExHandler();  
    /**程序的Context**/  
    private Context mContext;  
    /**用来存储设备信息和异常信息 **/
    private Map<String, String> infos = new HashMap<String, String>();  
    /**用于格式化日期,作为日志文件名的一部分  **/
    private DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");  
  
    /** 保证只有一个AppExHandler实例 */
    private AppExHandler() {
    }
  
    /** 获取GPSExHandler实例 ,单例模式 */
    public static AppExHandler getInstance() {
        return INSTANCE;
    }

    /**
     * 初始化 
     *
     * @param context
     */
    public void init(Context context) {
        mContext = context;
        //获取系统默认的UncaughtException处理器 
        mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();
        //设置该AppExHandler为程序的默认处理器 
        Thread.setDefaultUncaughtExceptionHandler(this);
    }

    /**
     * 当UncaughtException发生时会转入该函数来处理 
     */
    @Override
    public void uncaughtException(Thread thread, Throwable ex) {
        handleException(ex);

        if ( mDefaultHandler != null) {
            //如果用户没有处理则让系统默认的异常处理器来处理
            mDefaultHandler.uncaughtException(thread, ex);
        }

        /**重新启动程序**/
  /*          Intent intent = new Intent(this.mContext, WelcomeActivity.class);
            PendingIntent restartIntent = PendingIntent.getActivity(this.mContext, 0, intent,
                    Intent.FLAG_ACTIVITY_NEW_TASK);
            // 1秒钟后重启应用
            AlarmManager mgr = (AlarmManager)mContext.getSystemService(Context.ALARM_SERVICE);
            mgr.set(AlarmManager.RTC, System.currentTimeMillis() + 1000, restartIntent);*/
        // 退出程序
        android.os.Process.killProcess(android.os.Process.myPid());
    }  
  
    /** 
     * 自定义错误处理,收集错误信息 发送错误报告等操作均在此完成. 
     *  
     * @param ex 
     * @return true:如果处理了该异常信息;否则返回false. 
     */  
    private boolean handleException(Throwable ex) {  
        if (ex == null) {  
            return false;  
        }

        //收集设备参数信息
        collectDeviceInfo(mContext);
        //保存日志文件到本地
        saveExceptionInfo2File(ex);

        // String log_filename = saveExceptionInfo2File(ex);
        /**将错误日志返回到服务器中**/
/*        if (null != log_filename) {
            //sendMail();
        }*/

//        try {
//            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
//                //使用Toast来显示异常信息
//                new Thread() {
//                    @Override
//                    public void run() {
//                        Looper.prepare();
//                        Toast.makeText(mContext, "很抱歉,程序出现异常,即将退出.", Toast.LENGTH_LONG).show();
//                        Looper.loop();
//                    }
//                }.start();
//            }
//            Thread.sleep(1000);
//        } catch (InterruptedException e) {
//            Log.e(TAG, "error : ", e);
//        }

        return true;  
    }  
      
    /** 
     * 收集设备参数信息 
     * @param ctx 
     */  
    public void collectDeviceInfo(Context ctx) {
        try {
            PackageManager pm = ctx.getPackageManager();  
            PackageInfo pi = pm.getPackageInfo(ctx.getPackageName(), PackageManager.GET_ACTIVITIES);  
            if (pi != null) {
                String versionName = pi.versionName == null ? "null" : pi.versionName;
                String versionCode = pi.versionCode + "";
                infos.put("versionName", versionName);
                infos.put("versionCode", versionCode);
            }
        } catch (NameNotFoundException e) {
            Log.e(TAG, "an error occured when collect package info", e);
        }  
        Field[] fields = Build.class.getDeclaredFields();
        for (Field field : fields) {
            try {
                field.setAccessible(true);
                infos.put(field.getName(), field.get(null).toString());
                Log.d(TAG, field.getName() + " : " + field.get(null));
            } catch (Exception e) {
                Log.e(TAG, "an error occured when collect crash info", e);
            }
        }
    }  
  
    /** 
     * 保存错误信息到文件中 
     *  
     * @param ex 
     * @return  返回文件名称,便于将文件传送到服务器 
     */  
    private String saveExceptionInfo2File(Throwable ex) {
          
        StringBuffer sb = new StringBuffer();
        for (Map.Entry<String, String> entry : infos.entrySet()) {
            String key = entry.getKey();
            String value = entry.getValue();
            sb.append(key + "=" + value + "\n");
        }  
          
        Writer writer = new StringWriter();
        PrintWriter printWriter = new PrintWriter(writer);
        ex.printStackTrace(printWriter);
        Throwable cause = ex.getCause();
        while (cause != null) {
            cause.printStackTrace(printWriter);
            cause = cause.getCause();
        }
        printWriter.close();
        String result = writer.toString();
        sb.append(result);
        FileOutputStream fos = null;
        try {  
            long timestamp = System.currentTimeMillis();
            String time = formatter.format(new Date());
            String fileName = "E-" + time + "-R" + ".log";
            if (Utils.sdCardIsAvailable()) {
                String path = ConstData.LOG_LOCATION;//保存错误日志到sd卡中
                File dir = new File(path);
                if (!dir.exists()) {
                    dir.mkdirs();
                }
                fos = new FileOutputStream(path + fileName);
                fos.write(sb.toString().getBytes());
                fos.close();
                Log.e(TAG, "catch error log : " + sb.toString());
            }
            else {
                return null;
            }
            return fileName;  
        } catch (Exception e) {
            Log.e(TAG, "an error occured while writing file...", e);
        } finally {
            if (fos != null) {
                try {
                    fos.close();
                    fos = null;
                } catch (IOException e) {
                }
            }
        }
        return null;  
    }
}